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use super::*;
use filmcraft_geom::{Affine, Vec2};
use filmcraft_render::Blend;
use filmcraft_render::plan::execute_cpu;
fn device() -> Option<(wgpu::Device, wgpu::Queue)> {
let instance = wgpu::Instance::default();
let adapter = pollster::block_on(instance.request_adapter(&wgpu::RequestAdapterOptions::default())).ok()?;
pollster::block_on(adapter.request_device(&wgpu::DeviceDescriptor::default())).ok()
}
fn yuv_frame(w: u32, h: u32) -> Arc<VideoFrame> {
let (cw, ch) = (w.div_ceil(2), h.div_ceil(2));
let y: Vec<u8> = (0..w * h).map(|i| (16 + ((i % w) * 219 / w)) as u8).collect();
let u: Vec<u8> = (0..cw * ch).map(|i| (64 + (i / cw) * 128 / ch) as u8).collect();
let v: Vec<u8> = (0..cw * ch).map(|i| (200 - (i % cw) * 100 / cw) as u8).collect();
Arc::new(VideoFrame {
width: w,
height: h,
data: PixelData::Yuv8 { planes: [Arc::new(y), Arc::new(u), Arc::new(v)], chroma: Chroma::C420, alpha: None },
color: filmcraft_color::ColorInfo::REC709,
par: (1, 1),
pts: Default::default(),
})
}
#[test]
fn gpu_matches_cpu_plan() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let mut c = GpuCompositor::new(&dev, &q);
let pixels = filmcraft_media::generators::render(
&filmcraft_media::Generator::Demo(filmcraft_media::DemoScene::OceanSunset),
320,
180,
1.0,
24,
filmcraft_time::FrameRate::FPS_24,
);
let rgba = Arc::new(VideoFrame::rgba8(320, 180, pixels));
let (w, h) = (320usize, 180usize);
let plan = FramePlan::Layers {
width: w,
height: h,
layers: vec![
PlanLayer { frame: yuv_frame(640, 360), matrix: Affine::scale(0.5, 0.5), opacity: 1.0, blend: Blend::Normal },
PlanLayer {
frame: rgba,
matrix: Affine::motion(Vec2::new(200.0, 100.0), Vec2::new(0.4, 0.4), 12.0, Vec2::new(160.0, 90.0)),
opacity: 0.7,
blend: Blend::Normal,
},
],
};
let cpu = execute_cpu(&plan).over_black_rgba8();
c.composite(&plan);
let (gw, gh, gpu) = c.read_output().expect("readback");
assert_eq!((gw as usize, gh as usize), (w, h));
// compare away from antialiased edges: mean abs error and 99th percentile
let mut diffs: Vec<u32> =
cpu.chunks(4).zip(gpu.chunks(4)).map(|(a, b)| (0..3).map(|k| (a[k] as i32 - b[k] as i32).unsigned_abs()).max().unwrap_or(0)).collect();
diffs.sort_unstable();
let p99 = diffs[diffs.len() * 99 / 100];
let mean = diffs.iter().sum::<u32>() as f64 / diffs.len() as f64;
assert!(p99 <= 6 && mean < 1.5, "p99 {p99}, mean {mean}");
// cache: compositing the same plan again uploads nothing
let before = c.uploaded_bytes;
c.composite(&plan);
assert_eq!(c.uploaded_bytes, before);
}
#[test]
fn half_float_conversion() {
for v in [0.0f32, 1.0, 0.5, 0.123, 65504.0, -2.0, 1e-5] {
let h = f32_to_f16(v);
// decode
let s = if h & 0x8000 != 0 { -1.0 } else { 1.0 };
let e = ((h >> 10) & 0x1f) as i32;
let m = (h & 0x3ff) as f32;
let d = if e == 0 { s * m * 2f32.powi(-24) } else { s * (1.0 + m / 1024.0) * 2f32.powi(e - 15) };
assert!((d - v).abs() <= v.abs() * 1e-3 + 1e-6, "{v} → {d}");
}
}
#[test]
fn prepared_upload_matches_inline_conversion() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let (w, h) = (64u32, 36u32);
let yuv16 = Arc::new(VideoFrame {
width: w,
height: h,
data: PixelData::Yuv16 {
planes: [
Arc::new((0..w * h).map(|i| (64 + (i * 7) % 876) as u16).collect()),
Arc::new((0..w * h / 2).map(|i| (64 + (i * 13) % 896) as u16).collect()),
Arc::new((0..w * h / 2).map(|i| (960 - (i * 5) % 896) as u16).collect()),
],
chroma: Chroma::C422,
bits: 10,
alpha: None,
},
color: filmcraft_color::ColorInfo::REC709,
par: (1, 1),
pts: Default::default(),
});
let f32_layer: Vec<f32> = (0..w * h * 4).map(|i| ((i * 37) % 1000) as f32 / 1000.0 * if i % 4 == 3 { 1.0 } else { 0.6 }).collect();
let rgbaf = Arc::new(VideoFrame::rgba_f32(w, h, f32_layer.clone()));
let layers = FramePlan::Layers {
width: w as usize,
height: h as usize,
layers: vec![
PlanLayer { frame: yuv16, matrix: Affine::IDENTITY, opacity: 1.0, blend: Blend::Normal },
PlanLayer { frame: rgbaf, matrix: Affine::scale(0.5, 0.5), opacity: 0.8, blend: Blend::Normal },
],
};
let image = FramePlan::Image(filmcraft_render::Image { w: w as usize, h: h as usize, px: f32_layer });
for plan in [layers, image] {
let mut a = GpuCompositor::new(&dev, &q);
a.composite(&plan);
let inline = a.read_output().expect("readback");
let mut b = GpuCompositor::new(&dev, &q);
let prep = prepare(&plan);
assert!(prep.bytes() > 0);
b.composite_prepared(&plan, Some(&prep));
let prepared = b.read_output().expect("readback");
assert!(inline == prepared, "prepared upload differs");
}
}
/// The upload cache is keyed by pixel-buffer address, so it must keep the buffer alive: otherwise
/// a new frame allocated at a freed frame's address is drawn with the stale texture (seen as
/// whole frames from a previous composite in `crates/golden` GPU parity).
#[test]
fn upload_cache_keeps_buffers_alive() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let mut c = GpuCompositor::new(&dev, &q);
let px = Arc::new(vec![200u8; 16 * 8 * 4]);
let frame = Arc::new(VideoFrame { width: 16, height: 8, data: PixelData::Rgba8(px.clone()), ..(*yuv_frame(16, 8)).clone() });
let plan = FramePlan::Layers { width: 16, height: 8, layers: vec![PlanLayer { frame, matrix: Affine::IDENTITY, opacity: 1.0, blend: Blend::Normal }] };
c.composite(&plan);
drop(plan);
assert!(Arc::strong_count(&px) > 1, "cached upload must own its pixel buffer");
}
/// The WGSL tetrahedral LUT matches `Lut3d::apply` on the CPU.
#[test]
fn gpu_lut_matches_cpu_tetrahedral() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let g = GpuLut::new(&dev, &q);
for size in [2usize, 17, 33, 65] {
let mut lut = filmcraft_color::Lut3d::from_fn(size, |c| {
[(c[0] * c[1] + c[2] * c[2]).sin(), c[1].powf(0.45) * (1.0 - 0.3 * c[0]), (c[0] - c[2]).abs() + 0.1 * c[1]]
});
if size == 17 {
lut.domain_min = [-0.1, 0.0, 0.0];
lut.domain_max = [1.2, 1.0, 2.0];
}
let mut s = 99u64;
let mut px = Vec::new();
for _ in 0..70_000 {
for k in 0..4 {
s ^= s << 13;
s ^= s >> 7;
s ^= s << 17;
px.push(if k == 3 { 0.5 } else { (s % 10_001) as f32 / 10_000.0 * 1.2 - 0.1 });
}
}
let gpu = g.apply(&lut, &px).expect("gpu lut");
let mut worst = 0f32;
for (i, p) in px.as_chunks::<4>().0.iter().enumerate() {
let c = lut.apply([p[0], p[1], p[2]]);
for k in 0..3 {
worst = worst.max((c[k] - gpu[i * 4 + k]).abs());
}
assert_eq!(gpu[i * 4 + 3], 0.5);
}
eprintln!("LUT {size}³: max |cpu − gpu| = {worst:e}");
assert!(worst < 1e-4, "size {size}: max |cpu - gpu| = {worst}");
}
}
fn test_masks(scale: f32) -> Vec<filmcraft_render::mask::FlatMask> {
use filmcraft_project::{Mask, MaskMode, MaskPath, ParamValue};
let mut a = Mask::new("a", MaskPath::ellipse(Vec2::new(150.0, 90.0), Vec2::new(90.0, 55.0)));
a.feather.value = ParamValue::Float(24.0);
a.expansion.value = ParamValue::Float(6.0);
let mut b = Mask::new("b", MaskPath::polygon(&[Vec2::new(40.0, 20.0), Vec2::new(260.0, 50.0), Vec2::new(120.0, 170.0)]));
b.mode = MaskMode::Subtract;
b.feather.value = ParamValue::Float(0.0);
b.opacity.value = ParamValue::Float(70.0);
let mut c = Mask::new("c", MaskPath::rect(200.0, 100.0, 300.0, 175.0));
c.mode = MaskMode::Difference;
c.inverted = true;
c.feather.value = ParamValue::Float(3.5);
filmcraft_render::mask::prepare(&[a, b, c], filmcraft_time::Tick(0), scale)
}
#[test]
fn gpu_mask_coverage_matches_cpu() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let g = crate::GpuMask::new(&dev, &q);
for scale in [1.0f32, 0.5] {
let masks = test_masks(scale);
let (w, h) = ((320.0 * scale) as usize, (180.0 * scale) as usize);
let cpu = filmcraft_render::mask::coverage(&masks, w, h).unwrap();
let gpu = g.coverage(&masks, w, h).expect("gpu coverage");
let worst = cpu.iter().zip(&gpu).map(|(a, b)| (a - b).abs()).fold(0f32, f32::max);
eprintln!("mask coverage @{scale}: max |cpu − gpu| = {worst:e}");
assert!(worst < 2e-4, "scale {scale}: {worst}");
assert!(cpu.iter().any(|v| *v > 0.99) && cpu.iter().any(|v| *v < 0.01) && cpu.iter().any(|v| *v > 0.2 && *v < 0.8));
}
}
#[test]
fn gpu_masked_mix_matches_cpu() {
let Some((dev, q)) = device() else {
eprintln!("no GPU adapter; skipping");
return;
};
let g = crate::GpuMask::new(&dev, &q);
let masks = test_masks(1.0);
let (w, h) = (320usize, 180usize);
let original = filmcraft_render::Image { w, h, px: (0..w * h * 4).map(|i| ((i * 37) % 101) as f32 / 100.0).collect() };
let mut effected = original.clone();
effected.px.iter_mut().for_each(|v| *v = 1.0 - *v * 0.5);
let gpu = g.mix(&masks, w, h, &original.px, &effected.px).expect("gpu mix");
let cov = filmcraft_render::mask::coverage(&masks, w, h).unwrap();
let mut cpu = effected.clone();
filmcraft_render::mask::mix(&mut cpu, &original, &cov);
let worst = cpu.px.iter().zip(&gpu).map(|(a, b)| (a - b).abs()).fold(0f32, f32::max);
eprintln!("masked mix: max |cpu − gpu| = {worst:e}");
assert!(worst < 2e-4, "{worst}");
}